Which statement is true regarding the output voltage of a transformer?

The statement that a complete short eliminates output voltage is accurate because when the secondary winding of a transformer is shorted, it creates a low-resistance path across the output. This condition prevents the transformer from effectively inducing a voltage because the current drawn from the secondary coil would be much higher, leading to increased losses and potentially damaging the transformer.

In a typical transformer operation, it relies on the magnetic coupling between the primary and secondary coils to produce voltage. When a short is applied, the magnetic field generated in the primary does not transfer any usable voltage to the secondary. Thus, a complete short essentially stops the transformer from performing its function, resulting in no output voltage being produced.